Frederick Johannes Bartlett - Bartletts

Hi Paul, there's a bit of confusion re the marriages of Rev. John Bartlett and his children from both marriages. Firstly I read he had an illigitimate child before he married Johanna Goeyeman. Then some reports say he had 2 children by her and others say they had 3 children. Mary Ann was born in 1816, John in 1818 and then is it Henry Richard or Richard Henry born in 1820. Henry (or Richard Henry) had Frederick and John Henry (my ancestor). Are we sure these 3 children were from Johanna Goeyeman who was a Khoisan woman? I was hoping (and been researching) that I was descended from the Rev's 2nd wife Susanna Haarhoff. Would love to receive copies and any Bartlett photos you have. My father and grandparents all died young so I have no photos at all.
Sincerely Marilyn